This category brings together articles about reservoirs connected to Nizhny Novgorod Oblast and neighboring regions of the Volga basin. The largest of them — the Gorky Reservoir and the Rybinsk Reservoir — were formed by the construction of hydroelectric power stations on the Volga and substantially changed the character of the surrounding territories. A separate topic is formed by the Consequences of the Cheboksary Reservoir's Rise: the flooding of agricultural land and settlements in Mari El and adjacent districts remains a subject of discussion to this day.